Depth sections of seismic velocities and receiver functions beneath the linear seismic array (along section Y = 0). (a) Profile of uplift rates observed by geodetic measurements (Yoshida et al. 2011). (b) P-wave velocity perturbation δVp/Vp. (c) S-wave velocity perturbation δVs/Vs. (d) Profile of low-frequency earthquakes (LFEs) from 2004 to 2012 determined by JMA. (e) Vp/Vs ratio. (f) Receiver function results. Red and blue denote positive and negative amplitudes, respectively. Relocated hypocenters are plotted for events within 15 km of each cross section, with gray circles indicating ordinary earthquakes and red stars marking LFEs. Gray masked areas represent regions of poor model resolution. Our interpretations of seismic structure and locations of three low-velocity anomalies discussed in the text (LV1 to LV3) are superimposed on each section.